Παραπομπή APA

Timmons, B. W., Proudfoot, N. A., MacDonald, M. J., Bray, S. R., & Cairney, J. (2012). The health outcomes and physical activity in preschoolers (HOPP) study: Rationale and design. BioMed Central.

Παραπομπή Chicago Style

Timmons, Brian W., Nicole A. Proudfoot, Maureen J. MacDonald, Steven R. Bray, και John Cairney. The Health Outcomes and Physical Activity in Preschoolers (HOPP) Study: Rationale and Design. BioMed Central, 2012.

Παραπομπή MLA

Timmons, Brian W., et al. The Health Outcomes and Physical Activity in Preschoolers (HOPP) Study: Rationale and Design. BioMed Central, 2012.

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